Tea has a pH of 4.9 and the major anions detected were oxalate and citrate. Any substance with a pH of less than 7 is considered acidic. The lower the number, the more acidic the substance. However, the article mentions that it is relatively low compared to alternatives such as cola (pH 2.5, even stronger than vinegar, which has a pH of 2.9), orange juice (3.5), or tomato juice (4.0). It is therefore recommended as an alternative beverage for individuals who want to minimize dental erosion due to acidity. It contains tannins which give it the astringent feel, including compounds like Gallic acid. So, now we can conclude that Tea totally can cause disease.
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